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On 01/13/2011 09:38 AM, Andrea Peri wrote:
<blockquote
cite="mid:AANLkTi=ZKogNZ0Xod1wCyX9zCwPp=NDPLqxTyc5xbPU6@mail.gmail.com"
type="cite">Hi,<br>
<br>
I have a poligonal layer and must draw new polygon copy-ing some
linear segments from another layer (linear layer).<br>
<br>
My goal is copy the interesting segments, from the linear layer,
needed to describe the polygon and after this complete the polygon
adding manually the eventually little segments needed to complete
the polygon.<br>
</blockquote>
<br>
Hi Andrea:<br>
Copying line features into a polygon shapefile won't work.<br>
Here are two ways you can try to accomplish the above. <br>
First in QGIS - using the new Points2One plugin. You should begin by
completing the line segments (make closed boundaries) *as lines*. Be
sure to add the additional little segments in the same direction as
the original line segments. And also be careful to enable the
snapping option (Project Properties->Snapping). And you will need
a unique attribute for each closed boundary. <br>
Next use "Extract nodes" in the Vector->Geometry Tools menu to
create a new, temporary point shape of all the nodes for each closed
boundary. Now run the Points2One plugin to create a polygon for each
closed boundary. Check the "Create output features based on input
field" and choose the unique attribute, from above, for each input
boundary.<br>
<br>
If the above doesn't work (the line segments might not be in correct
order?) then here's "Plan B" - Import your line feature into GRASS,
and start digitizing. Add the needed little segments in order to
create closed boundaries. (Be sure snapping is set properly) Now
digitize a centroid inside each new closed boundary, and voila, you
have created closed polygons. Export back out to a shapefile
(v.out.ogr) and you'll have a polygon shapefile.<br>
<br>
Regards,<br>
Micha <br>
<blockquote
cite="mid:AANLkTi=ZKogNZ0Xod1wCyX9zCwPp=NDPLqxTyc5xbPU6@mail.gmail.com"
type="cite">
<br>
I try using copy/paste in qgis trunk version.<br>
But notice qgis some strange situation.<br>
<br>
Infact.<br>
I put in editing the polygonal layer, and try to copy from the
linear to the polygon.<br>
Seems that qgis allow this action, but don't the line. <br>
Perhaps because it is not a a truly polygon.<br>
But after to paste the line in the poligonal layer i cannot to
complete the polygon because I don't see it and are not able to
complete it qith the tools of qgis. I would need to add some
segments to complete the polygon before to commit it.<br>
<br>
There is some plugin that allow an user to copy segments from
another layer and complete they before to commit all to the
destination layer ?<br clear="all">
<br>
Thx,<br>
<br>
-- <br>
-----------------<br>
Andrea Peri<br>
. . . . . . . . . <br>
qwerty אטלעש<br>
-----------------<br>
<br>
<br>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Micha Silver
Arava Development Co. +972-52-3665918
<a class="moz-txt-link-freetext" href="http://www.surfaces.co.il">http://www.surfaces.co.il</a>
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